<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <div id="app">
        <!-- <div ref="box">11</div> -->
        <!-- <input ref="ipt" type="text"> -->
        <!-- <audio src=""></audio> -->
        
        <!-- 画布 -->
        <canvas></canvas>


    </div>

    <script src="./js/vue.js"></script>
    <!-- ref (操作Dom) -->
    <script>
        new Vue({
            el: "#app",
            data: {
                
            },
            created() {
            //    console.log(this.$refs.box) 
            //    debugger
            },
            // beforeMount() {

            // },
            mounted() {
                // this.$refs.ipt.focus()
                // console.log(this.$refs.box)
            }
        })
    </script>
</body>

</html>